<template>
    <el-container class="home-container"> 
        <!-- 头部区域 -->        
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主题区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isShow ?'64px':'200px'"> 
                <div class="toggle-button" @click="toggleCollapse">|||</div>       
                <el-menu background-color="#333744" text-color="#fff" 
                active-text-color="#409Eff" unique-opened :collapse="isShow" :collapse-transition="false"
                router default-active="activePath">
                <!-- 一级菜单 -->
                    <el-submenu :index="item.id +''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单得模板区域 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                            <span>{{item.authName}}</span>
                        </template>   
                        <!-- 二级菜单-->
                        <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children"
                        :key="subItem.id" @click="saveNavState('/'+subItem.path)">                       
                            <!-- 二级菜单得模板区域 -->
                            <template slot="title">
                                <!-- 图标 -->
                                <i class="el-icon-menu"></i>
                                <!-- 文本 -->
                                <span>{{subItem.authName}}</span>
                            </template>                        
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 右侧内容主体 -->
            <el-main>
                <!-- 路由占位符 -->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>       
</template>

<script>
export default {
    data() {
        return{
            //左侧菜单数据
            menulist:[],
            iconsObj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao',
            },
            //是否折叠
            isShow:false,
            //被激活的链接地址
            activePath:''
        }        
    },
    created(){
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout() {
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        //获取所有得菜单
        async getMenuList(){
            const {data:res} = await this.$http.get('menus')
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
            this.menulist = res.data  
            console.log(res);        
        },
        //点击按钮，切换菜单的折叠与展开
        toggleCollapse(){          
            this.isShow = !this.isShow;
        },
        //保存链接的激活状态
        saveNavState(activePath) {
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath=activePath
        }
    }    
}
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header{
    background-color: #373D41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }

}

.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: 0;
    }
}
.el-main{
    background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color:#fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>>
